The Return That Never Returns

1#include <iostream>
2#include <stdexcept>
3#include <string>
4 
5std::string grade(int score) {
6    try {
7        if (score > 100) {
8            throw std::out_of_range("score above 100");
9        }
10        if (score >= 50) {
11            return "pass";
12        }
13        return "fail";
14    } catch (const std::out_of_range& e) {
15        std::cout << "error: " << e.what() << "\n";
16        return "invalid";
17    }
18}
19 
20int main() {
21    int scores[] = {80, 120, 30};
22    for (int score : scores) {
23        std::string result = grade(score);
24        std::cout << score << ": " << result << "\n";
25    }
26    return 0;
27}